Sunday, November 7, 2010

Order of Operations


The Order of Operations is

B- Brackets
E- Exponents
D- Division
M- Multiplication
A- Addition
S- Subtraction

This is a video explaining BEDMAS.

1. Annie has been asked to calculate 1.7+6÷2 She claims the answer is 3.85 Do you agree? Explain why or why not.
She is wrong because she didn't follow the Order of Operations and the correct answer is 4.7. I got my answer by doing this:
1.7+6÷2=
1.7+3=
4.7

2. Put brackets in the following expression to get the largest value possible. What problem solving strategy did you use? 3x2.8+6.4÷4=
There are 3 possible answers. (3 x 2.8) + 6.4 ÷ 4 = 10, 3 x 2.8 + (6.4 ÷ 4) = 10. and (3 x 2.8) + (6.4 ÷ 4) = 10.


3. Create a problem that could be solved using the following expression. 2.5 + 1.25 + 5 x 1.6.
Eric wants to buy a keyboard the cost 11.75 but he only has 1.60 dollars
he went home and ask his mom for 5 dollors
but he still missing 3.75
so he went to his uncles house to ask for money and his uncle gave him 2.50
he still missing 1.25 so he went to his sister for 1.25
This is an example we did at class:
Here is an Order of Operations game .

Thank you for reading. [:


Order of Operations

Brackets
Exponents
Division
In order from left to right
Multiplication
Addition
In order from left to right
Subtraction
Annie has been asked to calculate 1.7+6÷2 She claims the answer is 3.85 Do you agree? Explain why or why not
I disagree because the answer is 4.7
My calculations :
1.7+6÷2=
1.7+3=
4.7
Put brackets in the following expression to get the largest value as possible. what problem solving stratgy did you use?
3 x 2.8 + 6.4 ÷ 4
3 x (2.8 + 6.4) ÷ 4
3x 9.2 ÷4
27.6
÷4
6.9
Create a problem that could be solved using the following expression
2.5 + 1.25 + 5 X 1.6
Joe had friends who owed him money. Steve owed h
im $2.50. James owed him $1.25. His crew of 5 people, each of them owed him $1.60. All That Joe made $11.75

Example we did in class :










Bed mas game

Order of Operation

1. Annie has been asked to calculate 1.7+6÷2. She claims the answer is 3.85. Do you agree? Explain why or why not.

Answer: No I do not agree. The correct answer is 4.7. This is how I go my answer:

1.7+6÷2
1.7+3
= 4.7


2. Put brackets in the following expression to get the largest value possible. What problem solving strategy did you use? 3x2.8+6.4÷4

There can be two possible answers they are:

(3 x 2.8)+ 6.4 ÷ 4 or 3 x 2.8 + (6.4 ÷ 4)
8.4 + 6.4 ÷ 4 3 x 2.8 + 1.6
8.4 + 1.6 8.4 + 1.6
= 10 = 10

3. Create a problem that can be solved using the following expression: 2.5+1.25+5 x 1.6

Stevan had a garage sale. He sold his basketball for $2.50, he also sold a deck of cards for $1.25. Later that day he also sold 5 marbles at $1.60 each. He made a total of $11.75.

Heres an example of what we did in class.

2 x(4+8)÷2-1=
2x12÷2-1=
24÷2-1=
12-1= 11
Add caption
Here is a game you can play. Scroll down to math games and practice and click on #2.

Order Of Operations

Order Of Operations:

B-
brackets ( )
E- exponents a2
D- division ----------- in order from left to right.
M- multiplication ^^^^
A- addition ----------- in order from left to right.
S- subtraction ^^^^^^

Here is an example we did at class:














1) Annie has been asked to calculate 1.7 + 6 divided by 2. She claims the answer is 3.85.
Do you agree? Explain why or why not.

My Answer: I do not agree because she did not follow b.e.d.m.a.s division comes first before multiplication.
If she did follow b.e.d.m.a.s she would have gotten 4.7.

2) Put brackets in the following expression to get the largest value possible.
What problem solving strategy did you use? 3 x 2.8 + 6.4 divided by 4.

My Answer: ( 3 x 28 ) + 6.4 divided by 4
\/ |
6.4 + 6.4 divided by 4
| \/
8.4 + 1.6
10=

3) Create a problem that could be solved using the following expression.
2.5 + 1.5 + 5 x 1.6.

Solution:
Jewel wanted to buy a necklace but it costs 11.75 and she had no money. On the way home from The Necklace Store, Jewel collected 1.50. But she was still short $8. So Jewel told her mother about the necklace and her mother said ill give you 1.60 each chore, so Jewel did 5 chores and she collected exactly 8$! So Jewel now got the necklace she wanted.


Here is a bedmas game that is fun!


Here is a video explaining B.e.d.m.a.s:


Order of operations (language of Math)


B-Brackets ( )E-Exponents a2
D- Division
M-Multiplication ( order from left to right)
A- Addition ( order from left to right)
S- Subtraction

Here is a Example :





1 Annie has been asked to calculate 1.7 + 6 ÷ 2=
she claims that the answer is 3.85 do you agree? Explain why or why not.

A: i don't agree because she didn't use the bedmas which is the order of operations and the answer would be 4.7

2 Put brackets in the following expression to get the largest value possible. what problem solving strategy did you use? 3x2.8 + 6.4÷4

A: (3x2.8)+ 6.4÷4 = i rounded 2.8 into 3 so it would be 3x3

3 Create a problem that could be solve using the following expressions
2.5 +1.25 + 5 x 1.6

Expression: Ken has $10.50. He wen't to a store to buy a drink which cost $1.25. He also bought 5 bags of candy which is $1.60 and bought 1 milk for his brother which cost $2.50. Does he have enough money to buy all those items?

A: No because All those items was $11.75 and he only has $10.50

Here is a video of a Bedmas:

Order of Operations (The Language of Math)

Order of Operation:
B-brackets ( )
E-exponents a
²
D-division

M-multiplication (In order from left to right)

A-addition
S-subtraction (In order from left to right)

Example:



Solutions to solve:

1. Annie has been asked to calculate 1.7 + 6 ÷ 2=___
She claims that the answer is 3.85.
Do you agree? Explain why or why not.


A: I don't agree with her because she did not follow the order of operations of BEDMAS and the correct answer is suppose to be 4.7



2. Put the bracket in the following expression to get the largest value possible.
What problem solving strategy did you use?3 x 28+ 6.4 ÷ 4 =___


A: there is 3 possible answer (3 x 2.8) + 6.4 ÷ 4 = , 3 x 2.8 + (6.4 ÷ 4) = , and (3 x 2.8) + (6.4 ÷ 4) = and all of them is equals to 10




3. Create a problem that could be solved using the following expression. 2.5 + 1.25 + 5 x 1.6.

Expression: Kenny went to a Department store to but his missing supplies for school. He has $10 in his pocket. 5 package of pen which was $1.25 each, a calculator cost $1.60, and the pencil crayons cost $2.50 would he have enough money to buy his missing supplies?

A: No, he won't have enough money to buy his missing supplies because in total it was 11.75 and he only has 10 dollars.

Game:

Video:

Saturday, November 6, 2010

Order of Operations

B-Bracets ( )
E-Exponents a2
D-Division------->in order from left to right
M-Multiplcation--^
A-Addition------->in order from left to right
S-Subtraction------^

Here is one of the examples we did in class


These are some questions on, Order of Operations.


1. Anne has been asked to calculate 1.7 + 6 / 2. She claims her answer is 3.85. Do you you agree? Explain why or why not.

A. I do not agree with Anne, because she didn't use BEDMAS. If she did use it her answer would be 4.7.

2. Put bracets in the following expression to get the largest possible value. What problem solving strategy did you use? 3 x 2.8 + 6.4 / 4

A. I would put the bracets here, (3 x 2.8) +6.4 / 4. The strategy I used was that I saw there was multiplcation and I know if you multiply you can get a higher answer. Then I multiplied 3 x 2.8 and I got, 8.4.

3. Create a problem that could be solved using the following expression. 2.5 + 1.25 + 5 x 1.6.

A. John wants to buy a tool for work that is $11.75. But John notices he only has $2.50 in his wallet. Then John goes home and finds $1.25 in his piggy-bank. But he is still $8.00 short! So he decides to have a quick garage sale with 5 things in it that costs $1.60 each. At the end of the day all 5 items were sold and he got his $8.00. Then he goes to the store and buys that tool.

Game: game link

Video: video link (wouldn't let me put it on)

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